The new cap on Sallie Mae’s rate will be 9.875 percent plus LIBOR, which is the interest rate that banks charge each other for loans. The new lowest available rate will be LIBOR plus 2 percent, which reflects a half percent rate reduction. But remember, the exact interest rate Sallie Mae assigns to a specific loan will vary depending on the borrower’s credit score and repayment option. They’re also offering students the option to make $25 monthly payments while they’re in school to counter interest costs or defer payments until graduation. Another added bonus: For loans disbursed between July 1 and Oct. 1, Sallie Mae is offering free tuition insurance for a year.